/* -*- mode: C -*-  */
/* 
   IGraph library.
   Copyright (C) 2010-2012  Gabor Csardi <csardi.gabor@gmail.com>
   334 Harvard st, Cambridge MA, 02139 USA
   
   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.
   
   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.
   
   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 
   02110-1301 USA

*/

#include <igraph.h>

#define DIM1 10
#define DIM2 5

#define INT(a) (igraph_rng_get_integer(igraph_rng_default(), 0, (a)))

int main() {
  igraph_matrix_t mat, mat2;
  igraph_sparsemat_t spmat, spmat2;
  int i, j, nz1, nz2;
  igraph_vector_t sums1, sums2;
  
  
  igraph_rng_seed(igraph_rng_default(), 42);

  /* COPY */

  igraph_sparsemat_init(&spmat, DIM1, DIM2, 20);
  for (i=0; i<10; i++) {
    igraph_sparsemat_entry(&spmat, INT(DIM1-1), INT(DIM2-1), 1.0);
  }
  igraph_sparsemat_copy(&spmat2, &spmat);
  
  igraph_matrix_init(&mat, 0, 0);
  igraph_sparsemat_as_matrix(&mat, &spmat);
  igraph_matrix_init(&mat2, 0, 0);
  igraph_sparsemat_as_matrix(&mat2, &spmat2);
  if (!igraph_matrix_all_e(&mat, &mat2)) { return 1;}
  
  igraph_matrix_destroy(&mat2);
  igraph_sparsemat_destroy(&spmat2);
  
  igraph_sparsemat_compress(&spmat, &spmat2);
  igraph_sparsemat_destroy(&spmat);
  igraph_sparsemat_copy(&spmat, &spmat2);
  
  igraph_matrix_init(&mat2, 0, 0);
  igraph_sparsemat_as_matrix(&mat2, &spmat);
  if (!igraph_matrix_all_e(&mat, &mat2)) { return 2; }

  igraph_sparsemat_destroy(&spmat);
  igraph_sparsemat_destroy(&spmat2);
  igraph_matrix_destroy(&mat);
  igraph_matrix_destroy(&mat2);

  /* COLSUMS, ROWSUMS */
  
  igraph_sparsemat_init(&spmat, DIM1, DIM2, 20);
  for (i=0; i<10; i++) {
    igraph_sparsemat_entry(&spmat, INT(DIM1-1), INT(DIM2-1), 1.0);
  }
  igraph_sparsemat_compress(&spmat, &spmat2);

  igraph_matrix_init(&mat, 0, 0);
  igraph_sparsemat_as_matrix(&mat, &spmat);
  igraph_vector_init(&sums1, 0);
  igraph_vector_init(&sums2, 0);
  igraph_sparsemat_colsums(&spmat, &sums1);
  igraph_matrix_colsum(&mat, &sums2);
  if (!igraph_vector_all_e(&sums1, &sums2)) { return 3; }
  igraph_sparsemat_colsums(&spmat2, &sums1);
  if (!igraph_vector_all_e(&sums1, &sums2)) { return 4; }
  
  igraph_sparsemat_rowsums(&spmat, &sums1);
  igraph_matrix_rowsum(&mat, &sums2);
  if (!igraph_vector_all_e(&sums1, &sums2)) { return 5; }
  igraph_sparsemat_rowsums(&spmat2, &sums1);
  if (!igraph_vector_all_e(&sums1, &sums2)) { return 6; }
  
  igraph_matrix_destroy(&mat);
  igraph_sparsemat_destroy(&spmat);
  igraph_sparsemat_destroy(&spmat2);
  igraph_vector_destroy(&sums1);
  igraph_vector_destroy(&sums2);

  /* COUNT_NONZERO, COUNT_NONZEROTOL */
  
  igraph_sparsemat_init(&spmat, DIM1, DIM2, 20);
  igraph_sparsemat_entry(&spmat, 1, 2, 1.0);
  igraph_sparsemat_entry(&spmat, 1, 2, 1.0);
  igraph_sparsemat_entry(&spmat, 1, 3, 1e-12);
  for (i=0; i<10; i++) {
    igraph_sparsemat_entry(&spmat, INT(DIM1-1), INT(DIM2-1), 1.0);
  }
  igraph_sparsemat_compress(&spmat, &spmat2);

  igraph_matrix_init(&mat, 0, 0);
  igraph_sparsemat_as_matrix(&mat, &spmat2);

  nz1=igraph_sparsemat_count_nonzero(&spmat2);
  for (nz2=0, i=0; i<igraph_matrix_nrow(&mat); i++) {
    for (j=0; j<igraph_matrix_ncol(&mat); j++) {
      if (MATRIX(mat, i, j) != 0) { nz2++; }
    }
  }
  if (nz1 != nz2) { printf("%i %i\n", nz1, nz2); return 7; }
  
  nz1=igraph_sparsemat_count_nonzerotol(&spmat2, 1e-10);
  for (nz2=0, i=0; i<igraph_matrix_nrow(&mat); i++) {
    for (j=0; j<igraph_matrix_ncol(&mat); j++) {
      if (fabs(MATRIX(mat, i, j)) >= 1e-10) { nz2++; }
    }
  }
  if (nz1 != nz2) { printf("%i %i\n", nz1, nz2); return 8; }
  
  igraph_matrix_destroy(&mat);
  igraph_sparsemat_destroy(&spmat);
  igraph_sparsemat_destroy(&spmat2);

  /* SCALE */

  igraph_sparsemat_init(&spmat, DIM1, DIM2, 20);
  for (i=0; i<10; i++) {
    igraph_sparsemat_entry(&spmat, INT(DIM1-1), INT(DIM2-1), 1.0);
  }
  igraph_sparsemat_compress(&spmat, &spmat2);

  igraph_sparsemat_scale(&spmat, 2.0);
  igraph_sparsemat_scale(&spmat2, 2.0);
  igraph_matrix_init(&mat, 0, 0);
  igraph_sparsemat_as_matrix(&mat, &spmat);
  igraph_matrix_init(&mat2, 0, 0);
  igraph_sparsemat_as_matrix(&mat2, &spmat2);
  igraph_matrix_scale(&mat, 1.0/2.0);
  igraph_matrix_scale(&mat2, 1.0/2.0);
  if (!igraph_matrix_all_e(&mat, &mat2)) { return 9; }

  igraph_matrix_destroy(&mat);
  igraph_matrix_destroy(&mat2);
  igraph_sparsemat_destroy(&spmat);
  igraph_sparsemat_destroy(&spmat2);

  /* ADDROWS, ADDCOLS */

  igraph_sparsemat_init(&spmat, DIM1, DIM2, 20);
  for (i=0; i<10; i++) {
    igraph_sparsemat_entry(&spmat, INT(DIM1-1), INT(DIM2-1), 1.0);
  }
  igraph_sparsemat_compress(&spmat, &spmat2);
  
  igraph_sparsemat_add_rows(&spmat, 3); 
  igraph_sparsemat_add_cols(&spmat, 2);
  
  igraph_sparsemat_add_rows(&spmat2, 3);
  igraph_sparsemat_add_cols(&spmat2, 2);
  
  igraph_matrix_init(&mat, 0, 0);
  igraph_sparsemat_as_matrix(&mat, &spmat);
  igraph_matrix_init(&mat2, 0, 0);
  igraph_sparsemat_as_matrix(&mat2, &spmat2);
  if (!igraph_matrix_all_e(&mat, &mat2)) { return 10; }

  igraph_matrix_destroy(&mat);
  igraph_matrix_destroy(&mat2);
  igraph_sparsemat_destroy(&spmat);
  igraph_sparsemat_destroy(&spmat2);
  
  return 0;
}
